Shade-holder for lamps.



.T.v A. LEGGE & P. HUSTON.

SHADE HOLDER FOR LAMPS.

APPLICATION FILED FEB-6, 1911.

Patented July 25, 1911.

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- UNIT 1 PATENT OFFIQ THOMAS A. LEGGE AND PETER HUSTON, OF CHICAGO,ILLINOIS, ASSIGNORS TO TI-IE ADAMS & WES'ILAKE COMPANY, A CORPORATION OFILLINOIS.

SHADE-HOLDER FOR LAMPS.

To all whom it may concern:

Be it known that we,Ti-roMAs A. LEGGE and PETER HUs'roN, citizens of theUnited States, and residents of Chicago, county of Cook, and State ofIllinois, have invented certain new and useful Improvements inShade-Holders for Lamps, of which thefollowing is a specification, andwhich are illustrated in the accompanying drawings, forming a partthereof.

The invention relates to shade holders used more particularly inconnection with incandescent electric lamps, and of the type in whichthe flange of the shade is held within a base-plate by means of anendless helical spring which is compressed by being forced up along abeveled face of'a depending flange of the base-plate by means of anannulus having an instanding flange, and being in threaded engagementwith the periphery of the base.

The object of the invention is to prevent the separation of the annulusfrom the base in connection with the ordinary operation of the device;and it consists in a shadeholder of the type described,'with a removablestop for limiting the downward movement of the annulus.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a perspective of a lamp bracket with the holder and shadeshown in sectional detail; Fig. 2 is a plan view of the shadeholder; andFig. 3 is a detail in perspective of the stop-ring used for preventingthe separation of the parts of the holder.

The bracket 10 forms no part of the present invention, and may, ofcourse, be of any desired form. The same is true of the socket 11 forholding an incandescent lamp. This socket, as is usual in electric lampfixtures, is connected with the bracket 10, and upon its upper end ismounted the shade holder. This shade-holder consists of a circularbaseplate 12, centrally apertured, as indicated at 13, to fit upon thestem of the socket 11, and being provided with a depending marginalflange 14. This flange has its inner face beveled, as shown at 15, andits outer face threaded, as shown at 16. An annulus 17 is in threadedengagement with the periphery of the base 12, and has at its lowermargin an instanding flange 18, which, with the beveled face 15 of theflange of the base, forms a pocket within which is seated aSpecification of Letters Patent.

Application filed February 6, 1911.

Patented July 25, 1911.

sea-m1 No. 606,854.

sprling ring 19 which consists of a helical C01 The dimensions of theparts are such that the flange 20 of the shade 21 may pass the flange 18of the annulus 17. When the annulus is turned down upon the thread toincrease the size of the pocket between its flange and the beveled seat15, the spring ring 19 expands and permits the entry of the shade flange20. By turning up the annulus 17 the spring 19 is forced upwardly alongthe beveled face 15, and is thus contracted diametrically and forcedunder the shade flange 20, thereby preventing its withdrawal from theholder. As thus far described the device is of known construction.

In practice much trouble has arisen from the tendency of the user toentirely separate the elements of the holder in removing the shade.Although this is unnecessary, it is frequently done in railroad service,where the device is commonly used, as inexperienced hands arenecessarily often put at the work of attending the lamps. l/Vhen theparts are separated the annulus is apt to drop to the floor and bebruised and distorted, rendering repairs necessary. In order to preventthis annoyance the present invention involves the introduction of aremovable stop for limiting the downward movement of the annulus to thedistance only which is necessary to permit a sufficient expansion of theholding spring to release the shade. The preferred means foraccomplishing this result are illustrated in the drawings, and consistof an open wire ring 22, inserted in an annular channel 23 in the innerface of the annulus 17 above the threaded portion thereof. When the annulus is turned down to release the shade the ring 22 comes in contactwith a shoulder 24 formed on the periphery of the base 12 immediatelyabove the threads 16, and thus positively locks the parts to gether. Thering 22 is easily sprung into place when the parts are assembled, andwill remain within its seat until purposely removed therefrom by the useof a suitable tool.

The general appearance of the shadeholder is not changed from that whichhas heretofore been followed, and the stop ring is not discoverableexcept by close inspection, and could not readily be removed by aninexperienced person even though it were discovered.

Ve claim as our invention 1. In a shade holder for lamps, incombination, a circular base having a depending flange, the inner Wallof the flange being beveled and its outer Wall being threaded and havinga shoulder above the thread, a ring threaded to engage the thread of thebase and having an instanding flange at its outer edge, an expansibleclamping ring Within the flanged ring and seated on the flange thereof,and a removable stop secured Within the inner end of the flanged ringand engageable With the shoulder of the support.

2. In a shade holder for lamps, in combination, a circular base having adepending flange, the inner Wall of the flange being beveled and itsouter Wall being threaded and having a shoulder above the thread, a ringthreaded to engage the thread of the base and having an instandingflange at its outer edge and an annular recess adjacent its inner edge,an expansible ring seated Within the recess and projecting inwardlybeyond the threaded surface of the first-named ring, and an expansibleclamping ring inclosed Within the first-named ring and seated upon itsinstanding flange.

8. In a shade-holder for lamps, in combination, a circular base having athreaded periphery and a shoulder above the thread, an annulus inthreaded engagement with the base, means actuated by the annulus forclamping a shade, and a stop carried by the annulus and engageable Withthe shoulder.

THOMAS A. LEGGE. PETER HUSTON.

Witnesses:

EDWARD R. BRElTSPRECI-IER, WM. T. BRASSEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

